Throwing device with two-stage propulsion system

Abstract

The present disclosure provides a throwing device with a launcher and a propulsion system. The propulsion system comprises a retardant set between two sections of propellant for delaying the combustion and reducing the generated smoke or heat while launching the propulsion system. The launcher comprises: a tube for containing the propulsion system; and a trigger for triggering the ignition cartridge. A screw hole is in center of a bottom of the first chamber; nozzles are located around the screw hole; and a collar with a hole fixed in the bottom of the first chamber, wherein the ignition cartridge is fixed in the screw hole by the collar. The ignition cartridge comprises an explosive primer, and the launcher further comprises a firing pin triggered by the trigger to hit the explosive primer.

What is claimed is: 
     
       1. A throwing device, comprising:
 a propulsion system including:
 a first section including a first chamber having a first propellant and an ignition cartridge for igniting the first propellant; 
 a second section connected to the first section and including a second chamber having a second propellant; and 
 a retardant set disposed between the first propellant and the second propellant for delaying combustion from the first propellant to the second propellant, the retardant set including a third propellant, and a dish formed with holes through a surface thereof proximal to the second propellant and for containing the third propellant, and the retardant set further including a mesh covering the dish and the third propellant, wherein the mesh of the retardant set is disposed to face the first propellant, and wherein the dish of the retardant set is disposed to face the second propellant; and 
 
 a launcher including:
 a tube for containing the propulsion system; and 
 a trigger for triggering the ignition cartridge. 
 
 
     
     
       2. The throwing device of  claim 1 , further comprising:
 a screw hole formed in a center of a bottom of the first chamber; 
 nozzles disposed around the screw hole; and 
 a collar formed with a hole and fixed in the screw hole, wherein the ignition cartridge is fixed in the screw hole via the collar. 
 
     
     
       3. The throwing device of  claim 2 , wherein the ignition cartridge includes an explosive primer, and the launcher further comprises a firing pin triggered by the trigger to hit the explosive primer. 
     
     
       4. The throwing device of  claim 3 , wherein the ignition cartridge includes a cartridge propellant. 
     
     
       5. The throwing device of  claim 1 , wherein the third propellant includes Sorbitol, Potassium Nitrate, and Sodium Bicarbonate, wherein the Sodium Bicarbonate to the Sorbitol and the Potassium Nitrate is about 15 to 100 in weight. 
     
     
       6. The throwing device of  claim 5 , wherein the Sorbitol to the Potassium Nitrate is about 35 to 65 in weight. 
     
     
       7. The throwing device of  claim 1 , wherein the retardant set comprises
 third propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide. 
 
     
     
       8. The throwing device of  claim 1 , wherein the first propellant includes one or more combustion channels. 
     
     
       9. The throwing device of  claim 1 , wherein the second propellant includes one or more combustion channels. 
     
     
       10. The throwing device of  claim 1 , wherein the first chamber includes an open top and a bottom with holes. 
     
     
       11. The throwing device of  claim 10 , wherein the second chamber includes a bottom with holes, and the bottom of the second chamber is connected to the open top of the first chamber. 
     
     
       12. The throwing device of  claim 11 , wherein the retardant set is installed on the bottom of the second chamber. 
     
     
       13. The throwing device of  claim 12 , wherein a thickness of a space for containing the retardant set is about  1  cm. 
     
     
       14. The throwing device of  claim 1 , wherein an exposed surface of the first propellant is more than an exposed surface of the second propellant. 
     
     
       15. The throwing device of  claim 1 , further comprising a nozzle in a bottom of the first section. 
     
     
       16. The throwing device of  claim 15 , further comprising a space between the nozzle and the first propellant. 
     
     
       17. The throwing device of  claim 1 , further comprising a warhead over the second section. 
     
     
       18. The throwing device of  claim 1 , wherein the first propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide, and the second propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide. 
     
     
       19. The throwing device of  claim 1 , wherein each of the first propellant and the second propellant include Sorbitol and Potassium Nitrate, wherein the Sorbitol to the Potassium Nitrate is about 35 to 65 in weight.